CN110323018B - Resistor for isolating resistance element by using integral ceramic tube - Google Patents
Resistor for isolating resistance element by using integral ceramic tube Download PDFInfo
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- CN110323018B CN110323018B CN201910523136.3A CN201910523136A CN110323018B CN 110323018 B CN110323018 B CN 110323018B CN 201910523136 A CN201910523136 A CN 201910523136A CN 110323018 B CN110323018 B CN 110323018B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
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- H01C1/01—Mounting; Supporting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/01—Mounting; Supporting
- H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
- H01C1/028—Housing; Enclosing; Embedding; Filling the housing or enclosure the resistive element being embedded in insulation with outer enclosing sheath
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Abstract
A resistor using an integral porcelain tube to isolate a resistance element comprises a frame, wherein a resistance unit is arranged in the frame and is fixedly connected with the frame through a support piece; the resistance unit is a chip resistance unit formed by forming a resistance band or a resistance sheet in a vertically circuitous way, and the end parts at the vertically circuitous two ends of the resistance band or the resistance sheet in the resistance unit are isolated and positioned through an integral porcelain tube. The outer surface of the integral porcelain tube is provided with clamping grooves according to the arrangement distance of the resistance bands or resistance discs of the resistance units, the two end parts of all the resistance bands or resistance discs are integrally clamped into the clamping grooves of the integral porcelain tube, and the end parts of the resistance bands or resistance discs are isolated, insulated and positioned through the clamping grooves. The resistor band or the resistor disc is isolated and positioned by directly clamping the integral ceramic tube into the open slot of the resistor band or the resistor disc, the creepage distance of the resistor band or the resistor disc is increased, and the insulation performance of the resistor is improved.
Description
Technical Field
The invention relates to a resistor structure, in particular to an insulation structure between resistor bands or resistor discs of a chip resistor, which can effectively improve the insulation performance between the resistor bands or the resistor discs of the chip resistor and increase the creepage distance and the withstand voltage value of the resistor bands or the resistor discs; belonging to the technical field of chip resistor manufacture.
Background
The chip resistor is a resistor widely used in the present electric locomotive, for example, in order to enable a motor car or a high-speed rail running at a high speed to brake at a proper speed, the electric energy generated by converting kinetic energy and potential energy into heat energy through the brake resistor is required to be quickly converted into heat energy and dissipated into air, so that the vehicle is quickly and reliably decelerated, and the brake resistor used in the high-speed rail is the chip resistor. The existing brake sheet type resistor is generally formed by arranging resistors one by one in parallel to form a resistor bank, and then clamping the resistor bank by a supporting member to form a resistor unit, and an insulating spacer is required to be used between each resistor belt or each resistor sheet to insulate and separate the resistor element from the supporting member. The existing isolation mode is that one resistance band or one resistance sheet is isolated by one insulating insulator, and the isolation mode is still available for installing a brake resistor at the bottom of a vehicle body in the past, but the brake resistor is already installed at the top of the vehicle body in many high-speed rails or motor cars at present, so that the brake resistor is completely exposed in the sun and rain environment; in the independent isolation mode of one resistor strip or one resistor disc and one insulating insulator, gaps exist between the insulating insulator and the insulating insulator, and the gaps are easily soaked in rainwater, so that the creepage distance from the resistor strip or the resistor disc to a clamping screw rod connected through the resistor strip or the resistor disc is too short through rainwater soaking, the insulating property of the whole resistor in a rain environment is affected, and the high-voltage requirement in the rain environment cannot be met, so that the improvement is needed.
Patent documents in which the same technology as that of the present invention is not found through patent search are reported, and the following patents which have a certain relationship with the present invention are mainly included:
1. the patent number is CN0081696, the name is "resistor bank", the applicant is: patent of the invention by kresall limited, which discloses a resistor bank having first and second support members, a resistor element made of a strip of resistor material bent in a zigzag, and holding means consisting of a plurality of clips, each for holding the resistor element at a bend of the resistor element to a respective support member, characterized in that each clip has at least one fastening lug for insertion into at least one fastening hole of a corresponding bend of the resistor element.
2. Patent No. CN201621167383.2 entitled "a belt grounding resistor", filed by applicant: the utility model discloses a Guangdong ford electronics limited company's utility model patent, this patent disclose a belt earthing resistor, arrange the unit including resistance, resistance row unit includes the resistance area, insulating part, boom and a plurality of support, a plurality of supports all are connected with the boom and arrange along the length direction of boom, keep apart and fix through the insulating part between two adjacent supports, the resistance area is integrated into one piece and continuous bending structure, a plurality of bends and a plurality of supports of resistance area are arranged correspondingly, each bend of resistance area respectively with the support welded fastening that corresponds.
3. The patent number is CN201720020841.8, entitled "a modular resistor for grounding resistance cabinet", applicant is: the utility model discloses a wuhan's marine electric propulsion means institute (the seventh two institute of china ship reworking group company), this patent discloses a modular resistor for ground resistance cabinet, including two curb plates that the symmetry set up and set up the many boom between two curb plates, the boom on the cover be equipped with the mica pipe, the mica pipe on the cover be equipped with multiunit resistor module, the resistor module include a plurality of resistance bands or resistance card and porcelain that the interval set up, the positive and negative two-sided symmetry of resistance band or resistance card be provided with many hard golden mica strips, hard golden mica strip and resistance band or resistance card between be provided with soft golden mica strip, curb plate and resistor module between and between two adjacent resistor modules all be provided with the insulator that the cover was established on the mica pipe.
Through careful analysis of the above patents, although the patents relate to the structure of the chip resistor, some improved technical solutions are proposed, but through careful analysis, the improvements do not relate to a way of isolating and insulating a chip of the resistor strip or the resistor chip by using a plurality of porcelain pieces or insulating pieces, so that the insulation is achieved, and therefore, the patents do not solve the problem that the creepage distance between the resistor strips or the resistor chips of the sub-prisons and the fasteners penetrating through the porcelain pieces is shortened due to rainwater infiltration between the porcelain pieces or the insulating pieces, the insulation performance of the resistor unit in a rain environment is affected, and the high-voltage requirement in the rain environment cannot be met, so that further research and improvement are needed.
Disclosure of Invention
The invention aims to provide a novel chip resistor structure aiming at the problems that the existing chip resistor is insulated and isolated between a porcelain piece and a resistance band or a resistance card, and the creepage distance is shortened easily in a rain environment by adopting a single porcelain piece, so that the insulation performance of a resistance unit in the rain environment is influenced, and the high-voltage requirement in the rain environment cannot be met.
In order to achieve the purpose, the invention provides a resistor for isolating a resistance element by using an integral porcelain tube, which comprises a frame, wherein a resistance unit is arranged in the frame, and the resistance unit is fixedly connected with the frame through a supporting piece; the resistance unit is a chip resistance unit formed by vertically circuitous molding of a resistance band or a resistance sheet, and is characterized in that the end parts of the vertically circuitous two ends of the resistance band or the resistance sheet in the resistance unit are isolated and positioned through an integral porcelain tube.
Further, the whole ceramic tube is made into a long-strip-shaped whole ceramic tube through the whole ceramic tube for isolation and positioning, clamping grooves are formed in the outer surface of the whole ceramic tube according to the arrangement intervals of the resistance bands or the resistance discs of the resistance units, the two end parts of all the resistance bands or the resistance discs are integrally clamped into the clamping grooves of the whole ceramic tube, and isolation insulation and positioning are formed between the end parts of the resistance bands or the resistance discs through the clamping grooves.
Furthermore, the isolation insulation and the positioning between the resistance bands or the resistance sheets are realized by the clamping grooves, namely non-circular holes are formed in the end parts at the two ends of the resistance bands or the resistance sheets in the resistance unit, the integral ceramic tube penetrates through the non-circular holes at the end parts at the two ends of the resistance bands or the resistance sheets, the integral ceramic tube is rotated, the resistance bands or the resistance sheets are clamped into the clamping grooves of the integral ceramic tube, and the clamping grooves are formed to isolate, insulate and position between the resistance bands or the resistance sheets.
Furthermore, the step of forming isolation insulation and positioning between the resistance bands or the resistance sheets through the clamping grooves is that a half-open groove is formed in end head parts at two ends of the resistance bands or the resistance sheets in the resistance unit, which are vertically circuitous, and the integral ceramic tube is directly clamped into the half-open groove of the resistance bands in the resistance unit, so that the resistance bands or the resistance sheets are clamped into the clamping grooves of the integral ceramic tube, and the clamping grooves are formed to form isolation insulation and positioning between the resistance bands or the resistance sheets.
Furthermore, the clamping grooves of the integral ceramic tube are arranged on the outer surface of the integral ceramic tube according to the arrangement intervals of the resistance bands or the resistance discs of the resistance units, the clamping grooves are formed in the integral ceramic tube from the outer surface of the integral ceramic tube, the quantity of the clamping grooves corresponds to the quantity of the resistance bands or the resistance discs of the resistance units, and therefore the resistance bands or the resistance discs can be completely clamped in the corresponding clamping grooves of the integral ceramic tube after being combined.
Furthermore, the depth of the clamping groove is based on the condition that the minimum thickness of the insulating material is reserved and the withstand voltage grade of the insulating material can be met, so that the clamping positioning and the insulating requirements after the resistance band or the resistance card is clamped into the clamping groove are met.
Furthermore, the overall porcelain tube is in a round, oval, rhombic, any polygonal or multi-tooth structure, and a clamping groove is formed in the outer surface of the round, oval, rhombic, any polygonal or multi-tooth structure.
Furthermore, the clamping grooves of the integral porcelain tube with the oval or diamond structure are formed in opposite angles in the direction of the long axis, the two sides of the integral porcelain tube are provided with grooves, and the grooves are formed from the two top ends of the long axis to the inner surface of the center; the depth of the clamping groove is based on the length of the reserved porcelain material and the distance of the reserved porcelain material is not less than the length of the short shaft, and the reserved bottom diameter at the clamping groove is smaller than the dimension length of the short shaft.
Furthermore, the integral ceramic tube with the oval or diamond structure penetrates through non-circular holes at two ends of the resistance band or the resistance sheet and then the resistance band or the resistance sheet is screwed into the clamping groove of the integral ceramic tube through rotation.
Furthermore, the integral ceramic tube is clamped into the resistor band or the resistor disc, so that the upper and lower ports of the resistor disc are clamped into the clamping grooves of the integral ceramic tube, and then the integral ceramic tube and the support piece are relatively fixed together to form a complete resistor unit.
The invention has the advantages that:
the invention changes the existing mode of isolating and insulating the resistance band or the resistance card by using the porcelain or the insulator respectively into the mode of insulating and isolating the resistance band or the resistance card by using the whole insulating tube, thereby not only simplifying the isolation mode, but also improving the overall insulating property of the resistance unit, effectively solving the problem that the creepage distance is easy to shorten in the rain environment due to the isolation and insulation between the resistance band or the resistance card, effectively improving the insulating property of the resistance unit in the rain environment, and meeting the high-voltage resistant requirement of the resistance unit in the rain environment.
Drawings
FIG. 1 is a schematic diagram of a prior art resistor structure;
FIG. 2 is a schematic diagram of a resistor configuration according to an embodiment of the present invention;
FIG. 3 is a schematic view of an assembly of a whole insulating tube according to the present invention;
FIG. 4 is an enlarged schematic view of the end of the entire insulating tube of the resistor unit of FIG. 3;
FIG. 5 is a schematic view of FIG. 3 taken in the direction of K;
FIG. 6 is a schematic view of a full insulation tube configuration;
FIG. 7 is a cross-sectional schematic view of FIG. 6;
FIG. 8 is a schematic diagram of an assembled resistor unit according to another embodiment of the present invention;
FIG. 9 is an enlarged view of the end of the insulating tube shown in FIG. 8 from the side of the end of the insulating tube;
FIG. 10 is a perspective view of the entire insulating tube of FIG. 8;
FIG. 11 is an enlarged side view of the end of an entire insulating tube according to another embodiment;
FIG. 12 is a perspective view of the tooth-shaped integral porcelain tube of FIG. 11;
fig. 13 is a partial cross-sectional view of the integral porcelain tube of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and specific examples.
Comparative example
The basic structure of a conventional chip resistor is shown in fig. 1, and it can be seen from the drawing that the chip resistor is a band-type grounding resistor, and includes two side plates 101 arranged left and right and three resistor bank units 102 arranged side by side up and down between the side plates 101, each resistor bank unit 102 includes a resistor band 103, a porcelain 104 and a string 105, and two ends of the string 105 are respectively fixedly connected with the two side plates 101. The resistance bands 103 are integrally formed and continuously bent, the bent parts are in U-shaped structures, preferably large-arc semicircular structures, overlarge current density is avoided, the width and the thickness of the resistance bands 103 are uniform, the resistance bands 103 are isolated by the porcelain 104, the unit heating amount of the resistance bands 103 is stable, the conductive working area is not connected with a bolt, a conductive ring, welding and other structures, the resistance bands are connected in series through the string rods 105, the structure is simple, the production and manufacturing cost is low, and the stable electrifying of the resistance bands 103 is guaranteed. However, a gap is formed between the resistance band 103 and the porcelain 104, which is likely to form a loop between the resistance band 103 and the string rod 105 in a rainy environment, so that the creepage distance of the resistance band 103 is greatly shortened, high-voltage conduction occurs, and the overall insulation performance is reduced.
Example one
As can be seen from fig. 2 to 7, the present invention relates to a resistor using an integral porcelain tube to isolate a resistance element, which comprises a frame, a resistance unit mounted in the frame, and a support member fixedly connected with the resistance unit; the resistor unit is a chip resistor unit formed by vertically circuitous molding of a resistor belt or a resistor disc; the resistance unit comprises a support rod 3, a resistance belt 1 and a whole insulating pipe 2, the support rod 3, the resistance belt 1 and the whole insulating pipe 2 are combined to form the resistance unit, and the isolation and the positioning of the two ends 4, which are circuitous up and down, of the resistance belt 1 are isolated and positioned through the whole insulating pipe.
The support rods 3 are cylindrical metal rods commonly called tie rods, and the number of the support rods 3 is two, namely a first support rod piece 5 and a second support rod piece 6; the first support rod piece 5 and the second support rod piece 6 are respectively positioned at the two ends 4 of the resistance band 1 which are vertically circuitous and penetrate through a central hole 7 on the whole insulating tube 2, two ends of the whole insulating tube 2 extend out of the whole insulating tube 2, the two extended ends are fixedly positioned by a fastener 8 and combined with the resistance band 1 to form a frame structure, and conductors 12 connected with the outside are arranged at the head end and the tail end of the resistance band 1 of the frame; the first support bar 5 and the second support bar 6 are fixed in parallel and separately in a frame (not shown in the figures) to which are fixed further resistance units (not shown in the figures) which together constitute a resistor system.
The resistance band 1 is a resistance element which is arranged between the first support rod 5 and the second support rod 6 and is combined in a continuous mode, namely the resistance band 1 is formed by combining a belt-shaped, sheet-shaped or strip-shaped resistance alloy without joints back and forth up and down, and the belt-shaped, sheet-shaped or strip-shaped resistance alloy is connected in series between the first support rod 5 and the second support rod 6 back and forth to form the resistance element. Mounting holes 9 for the whole insulating tube 2 to pass through are respectively formed at the upper end 4 and the lower end 4 of the resistor belt in a roundabout mode, and the mounting holes 9 are in an oval shape so as to ensure that the whole insulating tube 2 can pass through the mounting holes 9 of the resistor belt 1.
Further, the mounting holes 9 are elliptical, and the major axis directions of the ellipses of the upper and lower mounting holes 9 are identical, and the connecting direction of the mounting holes 9 at the upper and lower ends of the resistive strip 1 and the two mounting holes may be identical, or the major axes of the mounting holes 9 at the upper and lower ends of the resistive strip 1 may be parallel to each other.
The whole insulating tube 2 is an elliptical hollow tube, is matched with the elliptical shape of the mounting holes 9 at the upper end and the lower end of the resistance band 1, and is smaller than the mounting holes 9 at the upper end and the lower end of the resistance band 1 so as to ensure that the whole insulating tube can penetrate through the mounting holes 9 at the upper end and the lower end of the resistance band; clamping grooves 10 are formed in the outer surface of the whole insulating tube 2 according to the distance between the upper end and the lower end of the resistance band and used for clamping the two ends of the resistance band 1, fixing the resistance band 1 and forming insulation isolation between the two ends of the resistance band 1; the clamping grooves 10 are arranged at two ends of the oval whole insulating tube in the direction of the long axis 14, and the depth of each clamping groove 10 is set to ensure that the diameter 15 of the bottom of each clamping groove is smaller than the diameter of the oval short axis of the whole insulating tube; a central hole 7 for penetrating a support rod is formed in the center of the section of the whole insulating tube 2, and the central hole 7 is a through hole; the first support rod piece 5 and the second support rod piece 6 respectively penetrate through the central holes 7 of the upper and lower whole insulating pipes; the two ends of the whole insulating tube 2 are respectively provided with a groove or a boss 11 for fixing the whole insulating tube 2, and after the whole insulating tube passes through the mounting holes 9 at the upper end and the lower end of the resistance band, the whole insulating tube 2 is fixedly connected with the resistance band 1 or the support rod 3 through the groove or the boss 11 by an insulating tube fastener 13, so that the whole insulating tube 2 is positioned.
The whole insulating tube 2 is made of ceramic materials, and the whole insulating tube is made of proper ceramic materials according to the requirement of insulating property so as to ensure the high-temperature insulating property of the resistor unit.
The embodiment is characterized in that: the isolation and the positioning of the two ends of the resistance band are carried out by the whole insulating tube; firstly, an oval whole insulating tube with a clamping groove penetrates through a mounting hole in a resistance band according to the direction of an oval mounting hole in the resistance band; after the whole insulating tube passes through the oval mounting hole on the resistance band to reach the position, the whole insulating tube is rotated, so that the resistance band is clamped into the clamping groove on the oval shape of the whole insulating tube to form positioning and isolation; after the whole insulating tube rotates to the position, the whole insulating tube is locked and fixed by the fastener through the grooves or the convex blocks at the two ends of the whole insulating tube, and the whole insulating tube is prevented from rotating again.
Example two
The principle of the second embodiment is the same as that of the first embodiment, but the structure is slightly different, and different parts are shown in figures 8-10. the resistor which utilizes the integral porcelain tube to isolate the resistance element comprises a frame, a resistance unit is arranged in the frame, and the resistance unit is fixedly connected with the frame through a support; the resistance unit is a chip resistance unit formed by vertically winding a resistance band or a resistance sheet, and comprises a support rod 203, a resistance band 201, a whole insulating tube 202 and a conductor 213, and the support rod 203, the resistance band 201 and the whole insulating tube 202 are combined to form the resistance unit; the isolation and positioning of the two ends of the resistive band 202 is performed by the entire insulating tube 202 (as shown in fig. 8).
The two support rods 203 are respectively a first support rod piece and a second support rod piece; the first support rod piece and the second support rod piece are respectively positioned at two ends of the resistance band 201 and penetrate through the central hole on the whole insulating tube 202, two ends of the first support rod piece and the second support rod piece extend out of the whole insulating tube 202, the two extended ends are fixedly positioned by a fastening piece 208, and the first support rod piece and the second support rod piece and the resistance band 201 form a frame structure; the first support bar and the second support bar are fixed in parallel and separately in a frame, to which other resistance units are fixed, which together constitute a resistor system.
The resistance band 201 is a resistance element which is arranged between a first support rod piece and a second support rod piece and is combined in a continuous mode, namely the resistance band 201 is formed by combining a band-shaped, sheet-shaped or strip-shaped resistance alloy back and forth up and down without joints, the band-shaped, sheet-shaped or strip-shaped resistance alloy is connected in series between the first support rod piece and the second support rod piece back and forth to form the resistance element. The upper end and the lower end of the resistance band 201 are respectively provided with a half-opening installation groove 209 for clamping the whole insulating tube, and the half-opening installation groove 209 is in a C-shaped half-opening shape so as to ensure that the resistance band can be integrally clamped into the half-opening installation groove 209 of the whole insulating tube 202.
Further, the half-open mounting groove 209 has a "C" shape and a half-open shape, and the opening direction of the upper and lower half-open mounting grooves is any one of the top surface and the side surface of the end portion of the two ends of the resistance band, and the opening directions of the upper and lower half-open mounting grooves of the two ends of the resistance band may be the same or the two half-open mounting grooves may be opposite.
The whole insulating tube 202 is circular or any polygon (as shown in fig. 10); the outer surface of the whole insulating tube is longitudinally provided with clamping grooves 210 according to the distance between the end heads 204 at the upper end and the lower end of the resistance band 201, the clamping grooves are used for clamping the two end heads of the resistance band 201, fixing the resistance band and forming insulation isolation between the two end heads of the resistance band 201; the depth of the clamping groove 210 is set to ensure that the diameter 214 of the bottom of the clamping groove is smaller than the width of the two half-open mounting grooves 209 at the upper and lower ends of the resistance band, so that the whole insulating tube 202 can be completely clamped into the end 204 of the resistance band 201; a through hole for penetrating a support rod is formed in the center of the cross section of the whole insulating tube 202, and the first support rod piece and the second support rod piece respectively penetrate through the through holes of the whole insulating tube up and down; grooves or bosses 213 for fixing the whole insulating tube are respectively arranged at two ends of the whole insulating tube 202, and the whole insulating tube 202 is fixedly connected with the resistance band or the support rod through the grooves or bosses 202 by fasteners after passing through the mounting holes at the upper end and the lower end of the resistance band, so that the whole insulating tube is positioned.
The whole insulating tube 2 is made of polymer composite insulating materials, and the whole insulating tube is made of appropriate polymer materials according to the requirement of insulating performance so as to ensure the high-temperature insulating performance of the resistor unit as a standard.
The embodiment is characterized in that: the isolation and the positioning of the two ends of the resistance card are also carried out through the whole insulating tube; different from the first embodiment, however, the whole insulation tube is not inserted through the mounting holes at the two ends of the resistor disc, and the resistor disc is clamped into the clamping groove of the whole insulation tube by rotating the whole insulation tube, but the whole insulation tube with the clamping groove is directly clamped into the C-shaped opening of the resistor disc from the open grooves at the two ends of the resistor disc to form positioning and isolation; after the whole insulating tube is clamped in place, the whole insulating tube is locked and fixed by the fastener through the grooves or the convex blocks at the two ends of the whole insulating tube, and the whole insulating tube is prevented from loosening and sliding out.
EXAMPLE III
The principle of the third embodiment is the same as that of the second embodiment, except that the structure of the insulating tube is slightly different, and different parts are shown in the attached drawings 11 and 12; the resistance unit is a chip resistance unit formed by vertically circuitous molding of a resistance band or a resistance sheet, and comprises a support rod 303, a resistance band 301 and an integral ceramic tube 302, wherein the support rod 303, the resistance band 301 and the integral ceramic tube 302 are combined to form the resistance unit.
The integral ceramic tube 302 is an integral composite polymer insulating tube made of a composite polymer material, the cross section of the integral composite polymer insulating tube is in a multi-tooth shape (as shown in fig. 11 and 12), and a clamping groove 310 for clamping an electric resistance band is arranged on a tooth-shaped part 315 on the outer surface of the multi-tooth-shaped integral composite polymer insulating tube 302, so that the integral composite polymer insulating tube can be conveniently positioned and installed in the resistor; a central hole 307 is formed in the center of the integral porcelain tube 302, and the support rod 303 passes through the central hole 307 and is fixed by a fastener 308.
In the longitudinal direction (longitudinal direction) of the overall composite polymer insulating tube 302, the two ends of the resistance tape are arranged in order, and a notch 310 into which the resistance tape is fitted is opened in the serration 313.
The resistance belt is provided with a C-shaped opening 309, and the C-shaped openings 309 are horizontally arranged in the same direction on the side surfaces of two end parts of the resistance belt, and can also be arranged in different directions or in the opposite direction; the integral composite polymer insulating tube is clamped into the C-shaped opening on the resistance tape from the side surface.
The embodiment is characterized in that: when the resistor unit is assembled, the integral composite polymer insulating tube is clamped into the resistor unit from two sides of the resistor disc, so that the integral composite polymer insulating tube is convenient to disassemble in a resistor system.
Example four
The principle of the fourth embodiment is the same as that of the third embodiment, except that the integral composite polymer insulating tube is adopted, the directions of the C-shaped openings formed in the resistor band are slightly different, and the mutually-perpendicular staggered opening directions are adopted, wherein the opening at one end is arranged at the top of the resistor band, and the opening at the other end is arranged on the side face of the resistor band, so that the C-shaped opening clamped in the resistor band by the integral composite polymer insulating tube is more flexible and changeable.
The section of the integral composite polymer insulating pipe can be in various section shapes, can be in a circular, oval, any polygon or multi-tooth structure (as shown in figure 13), and is provided with a clamping groove on the outer surface of the circular, any polygon or multi-tooth shape.
The above listed embodiments are only for clear and complete description of the technical solution of the present invention with reference to the accompanying drawings; it is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention has the advantages that:
the invention changes the existing mode of isolating and insulating the resistance band or the resistance card by using the porcelain piece or the insulator respectively into the mode of insulating and isolating the resistance band or the resistance card by using the integral porcelain tube, thereby not only simplifying the isolation mode, but also improving the integral insulating property of the resistance unit, effectively solving the problem that the creepage distance is easy to be shortened in the rain environment due to the isolation and insulation between the resistance band or the resistance card, effectively improving the insulating property of the resistance unit in the rain environment, and meeting the high-voltage resistant requirement of the resistance unit in the rain environment.
Through adopting whole porcelain tube, between original porcelain spare and the resistance area has been eliminated completely, and the clearance between porcelain spare and the porcelain spare, make can not appear between resistance area and the bracing piece because the environment of drenching with the rain makes between porcelain spare and the resistance area, and the clearance between porcelain spare and the porcelain spare is soaked, lead to electrically conductive, thereby make the phenomenon that the creepage distance between resistance area and the bracing piece reduces greatly appear, the withstand voltage performance who adopts whole porcelain tube can not influenced by the environment of drenching with the rain again through experimental proof, and withstand voltage performance has had very big improvement, with traditional porcelain spare isolation mode contrast test effect as follows:
| serial number | Name (R) | Pressure resistance under dry conditions | Pressure resistance value under |
| 1 | Integral porcelain tube unit | 20000 VAC | 7000 |
| 2 | Legacy cell | 12000 VAC | 3000 VAC |
The test result clearly shows that the improved pressure resistance is obviously improved, and the performance requirements of various environments such as high-speed rails, motor cars and the like can be completely met.
Claims (7)
1. A resistor utilizing an integral porcelain tube to isolate a resistance element is characterized by comprising a frame, wherein a resistance unit is arranged in the frame and is fixedly connected with the frame through a support piece; the resistance unit is a chip resistance unit formed by forming a resistance band or a resistance sheet in a vertically circuitous way, and the end parts at the vertically circuitous two ends of the resistance band or the resistance sheet in the resistance unit are isolated and positioned through an integral porcelain tube; the method is characterized in that: the integral ceramic tube is made into a strip-shaped integral ceramic tube, clamping grooves are arranged on the outer surface of the integral ceramic tube according to the arrangement intervals of the resistance bands or the resistance discs of the resistance units, the two end parts of all the resistance bands or the resistance discs are integrally clamped into the clamping grooves of the integral ceramic tube, and the end parts of the resistance bands or the resistance discs are isolated, insulated and positioned through the clamping grooves; the appearance of the integral porcelain tube is oval, and a clamping groove is formed in the outer surface of the oval; the clamping grooves are formed in opposite angles in the direction of the long shaft, grooves are formed in two sides of the clamping grooves, and grooves are formed from two top ends of the long shaft to the inner surface of the center; the depth of the clamping groove is based on the length of the reserved porcelain material and the distance of the reserved porcelain material is not less than the length of the short shaft, and the reserved bottom diameter at the clamping groove is smaller than the dimension length of the short shaft.
2. The resistor as claimed in claim 1, wherein the resistor is isolated from the resistive element by a monolithic ceramic tube, wherein: the end parts at the two ends, which are roundabout up and down, of the resistance band or the resistance sheet in the resistance unit are provided with non-circular holes through the clamping groove, the whole ceramic tube penetrates through the non-circular holes at the end parts at the two ends, which are roundabout up and down, of the resistance band or the resistance sheet, then the whole ceramic tube is rotated, the resistance band or the resistance sheet is clamped into the clamping groove of the whole ceramic tube, and the clamping groove is formed to isolate, insulate and position the resistance band or the resistance sheet.
3. The resistor as claimed in claim 1, wherein the resistor is isolated from the resistive element by a monolithic ceramic tube, wherein: the resistance band or the resistance sheet is isolated, insulated and positioned by the clamping groove, a half-open groove is formed in the end parts of the two ends, which are vertically circuitous, of the resistance band or the resistance sheet in the resistance unit, the integral ceramic tube is directly clamped into the half-open groove of the resistance band in the resistance unit, the resistance band or the resistance sheet is clamped into the clamping groove of the integral ceramic tube, and the clamping groove is formed for isolating, insulating and positioning the resistance band or the resistance sheet.
4. The resistor as claimed in claim 1, wherein the resistor is isolated from the resistive element by a monolithic ceramic tube, wherein: the clamping grooves of the integral ceramic tube are formed in the whole ceramic tube from the outer surface of the integral ceramic tube according to the arrangement distance of the resistance bands or the resistance discs of the resistance units, the clamping grooves are formed in the integral ceramic tube from the outer surface of the integral ceramic tube, the number of the clamping grooves corresponds to the number of the resistance bands or the resistance discs of the resistance units, and therefore the resistance bands or the resistance discs can be completely clamped in the corresponding clamping grooves of the integral ceramic tube after being combined.
5. The resistor as claimed in claim 1, wherein the resistor is isolated from the resistive element by a monolithic ceramic tube, wherein: the depth of the clamping groove is based on the condition that the minimum thickness of the insulating material is reserved and the voltage-resistant grade of the insulating material can be met, and the clamping positioning and insulating requirements of the resistor belt or the resistor disc clamped into the clamping groove are met.
6. The resistor as claimed in claim 1, wherein the resistor is isolated from the resistive element by a monolithic ceramic tube, wherein: the integral ceramic tube penetrates through the non-circular holes at the two ends of the resistance band or the resistance sheet and then the resistance band or the resistance sheet is screwed into the clamping groove of the integral ceramic tube through rotation.
7. The resistor as claimed in claim 1, wherein the resistor is isolated from the resistive element by a monolithic ceramic tube, wherein: the integral ceramic tube is clamped into the resistance band or the resistance card, so that the upper and lower ports of the resistance card are clamped into the clamping groove of the integral ceramic tube, and then the integral ceramic tube and the support piece are relatively fixed together to form a complete resistance unit.
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| CN201910523136.3A CN110323018B (en) | 2019-06-17 | 2019-06-17 | Resistor for isolating resistance element by using integral ceramic tube |
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| CN201910523136.3A CN110323018B (en) | 2019-06-17 | 2019-06-17 | Resistor for isolating resistance element by using integral ceramic tube |
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| CN110323018B true CN110323018B (en) | 2022-03-29 |
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| CN216353609U (en) * | 2021-09-09 | 2022-04-19 | 广东福德电子有限公司 | Strengthen stable form's power resistor |
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| CN110323018A (en) | 2019-10-11 |
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